<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <style>
        div.xiaofangkuai{
            position: relative;
            left: 0px;
            top: 10px;
            width: 50px;
            height: 50px;animation-iteration-count: infinite;
            animation-direction: alternate;
            animation-play-state:running;
            animation-timing-function: linear;
            background-color: rgb(209, 187, 24);
            animation-name: op;
            animation-duration:3s ;
            animation-delay: 1s;
            
        }
        @keyframes op{
            0%{top: 120px;
            left: 230px;}
            50%{
                top: 345px;
                left:1160px;
            }
            100%{
                top: 570px;
                left:230px;
            }
        }
        p {
        width: 50px;
        height: 50px;
        opacity: 0;
      }
      .kb{
        position: absolute;
        top: 0;
        bottom: 0;
        right: 0;
        left: 0;
        margin: auto;
        width: 1000px;
        height: 500px;
        background-color: rgb(0, 255, 17);
        
      }
    </style>
    <title>V</title>
</head>
<body>
    <div class="kb"></div>
    <div class="xiaofangkuai"></div>
</body>
</html>